Cut the fresh lasagne sheets into wide strips. Bring a kettle of water to a boil. Separate the parsley leaves and stems and chop them. Slice the garlic. Brown the sausage in a large skillet. Stir in the garlic and parsley stems, and fennel, and continue to cook until golden. Pour in the red wine.
Melt 50g of the butter in a pan and whisk in the flour. Cook for 1 to 2 minutes, then whisk in the milk till smooth. Season with sea salt and freshly ground black pepper, add the bay leaf and simmer for 5 minutes. Turn off the heat. Remove the stalks from the spinach, then wilt with the remaining 20g butter in a covered pan.
Zuug.